Some of the earliest equipment shown was reviewed in "The Marconi Review"  in date ranges from 1928 to 1930. This means that the equipment was designed and in service well ahead of the dates on which it was reviewed.  In the earliest days of radio the word "set" was used to designate an assemblage of components. This could mean two or more pieces of equipment that are interconnected to provide a particular function.

Definition of frequency bands used in this web site:

MF stands for Medium  Frequency (wave) which at sea,  was 410 to 515 KHz
IF was Intermediate  Frequency which covered 1.6 to 3.8 MHz
HF was High Frequency and covered 4 MHz and above.

This link will help to explain British equipment nomenclature.

Marconi Company organizational tree.

MISCELLANEOUS

The Marconi Marine Company published  a weekly “periodical  magazine  called Marconi Mariner in which new equipment  and other news was featured. It published from late 1960’s to the mid 1980’s.  In the equipment documents of this web site, frequent mention is made of Marconi Mariner.   Ross Bradshaw G4DTD,  provides instructions on how to access these magazines.

To access this cache of periodicals, click on the  following URL:
http://mimco.pbworks.com/w/page/130268535/mariner
 Click on the page that comes up, scroll down a bit then select the issue you want to read.
 Note that  the issue might be too big to display so click the DOWNLOAD button

SERVICING DEPOTS

	This ad, placed in a periodical in September 1961 by Marconi Marine was intended to announce the selection of Marconi Marine equipment by a long time customer. Also included in the ad were Canadian Marconi  locations where service could be obtained for Marconi Marine equipment.
This extract, taken from page 1 of the book "Wireless At Sea" by H.E.. Hancock (1950),  shows all the third party service depots  in the Western hemisphere  where service could procured for Marconi Marine (International) equipment. .